Method for establishing fingerprint spectrum of rhizoma alismatis decoction and fingerprint spectrum
A technology for fingerprinting and establishing methods, applied in the field of quality identification of traditional Chinese medicine, to achieve the effects of high precision, good reproducibility, accurate quality detection and evaluation
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[0067] 4. Preparation of the test solution
[0068] The experiment investigated different extraction solvents, and the specific operation was as follows: take 5 mL of decoction concentrate of Alisma decoction Z1 sample, and precisely add extraction solvents (20% methanol, 40% methanol, 60% methanol, 80% methanol, 100% methanol , 20% ethanol, 40% ethanol, 60% ethanol, 80% ethanol, 95% ethanol) 25ml, ultrasonically extract 30min, let cool, centrifuge, get the supernatant liquid injection analysis. The results showed that 80% v / v methanol had the best extraction effect, and the peak shape and separation were better. The results are shown in Table 3.
[0069] Table 3 The main peak areas of the fingerprints obtained by different extraction solvents
[0070]
[0071] According to the above-mentioned investigation results, the preparation method of the test solution is determined as follows: take Alisma decoction decoction concentrated solution 5mL, accurately weighed, accuratel...
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